Carbureter.



W. F. SCHULZ.

GARBURETER.

APPLICATION FILED un. 24, 190s.

Patented Nov. 28, 19111;

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Swanton.

@NJC/aaa Unitarian Nsaurrns .PATENT oEEioE.

' WALTER F. SCHULZ, Vor CORONA, NEW YORK, Assmivon. or CNE-HALE 'ro cARL E. p sCHULaoE PENNINGTON, NEW JERSEY.

CARBUEETER.

Specication bf Letters Patent. Patented -NOV, 28,

s Application filed April 24, 1908;v vSerial N0. 429,052.

To all whom 'it may concern:

Be it known that I,4 WALTER F. SCHULZ, citizen of the United States, residing at Corona, in the county of Queens and Sta-te of New York, have invented certain new and useful Improvements in Carbureters, of. which the following is a specification.

This invention. cmprehends certain new and useful improvements in carbureters for internal combustion engines or motors using gasolene or other volatile fuel, and t-he invention has for its object a very simple and efficient construction of this character designed to procure practically constant conditions for carburization or vaporization under all engine conditions and speeds, the invention consisting in certain constructions, arrangements, and combinations of the parts that I shallhereinafter fully describe and then point out the advantageous results attained by the invention, concluding finally with the novel combinations and arrangements of parts in the appended claims.

For a full understanding of the invention,

reference is to be had to the following description and accompanying drawings, in which y Figure 1 is-a vertical sectional view of a carbureter embodying the invention; Fig. 2 is a detail top plan view of one form of admission and mixing valve that may be employed; Fig. 3 is a detail sectional view of another form of valve; and, Fig. 4 is a 4detail top-plan view of the valve. illustrated in ig. 3. l

Corresponding and like parts are referred to in the following description 'and indicated in all the 'views of the drawings by the same reference characters.

Referring to the drawing, the numeral l designates the base lor lower end of the carbureter cylinder or casing, which may be of any desired construction or design and which embodies a float cylinder 2 which preferably surrounds the air-inlet passage3.

4 designates a transversely extending hollow web which intersects the air passage and which communicates with the float chamber 2, as shown. The inspirator nozzlev 5 is mounted. upon thiswebl and pro-- jects upwardly centrally of the air passage 3, the induction tip being controlled by the lower tapered end 6a of theneedle valve 6, said valve being connected at its upper end by an adjustable mountingto the laterally extended cap 7 of an admission yalve 8.

The valve 8 kis approximately of mushroom,

shape, having a'hollow ,depending stem 9 mounted for longitudinal movement inthe depending sleeve 10 which projects downwardly into the air passage 3 fromthe bottom wall 11 of the mixing chamber 12, the said sleeve being spaced from the surrounding wall 4ofthe passage 3,- as clearly illustrated in Fig. 1. A l

The hollow stem 9 of the Valve 8 is de signed to inclose or encircle at its lower end the upper end of the inspirator nozzle 5, and the cap 7 of. the valve is designed to `be seated upon the bottom wall 11 of the mixing chamber 12, so as to control the air inlet ports 13 that are formed in said bottom wall -1 the lower end of the spring bearing against a collar screwed or otherwise secured to the lower end of the hollow stem 9 of the said admission valve. the spring 15 is of such a. length and is so constructed and arranged that it will exert a uniform tension .at all times4 upon the.

valve.

The cap 7 of the admission valvel 8 .is

. formed with any desired number of radial passages' 16. which establish communication between the interior of the hollow stem 9 and the interior of the mixing chamber 12 that leads. to the engine or motor. It is to be understood that the admission valve 8 is opened lby the suction of the piston Vin the engine cylinder in the usual wav.

In the practical operation of my improved carbureter, the gasolene or other hydrocarbon will bedrawn .in through theinspiratornozzle 5 and will be mixed with the air drawn in through the passage 3 and hollowvalve stem 9,-air also being drawn into lthe mixing chamber 12 through the ports 14 and. 13 when the admission valve 8 is opened. It isl to be understood however that it is not necessary to lift the admission valve`8 in .order to operate up to a certain speed, as acert-ain quantity of can alf.

ways enter the mixing chamber her the It is to be understood that practically even tension throughout the* limits of its motion in operation, and in -which `carburetor there is always main- ,tainedA a constant atmospheric pressure owing tc the fact that the mixing chamber 12 is always open to the admission of air, and even if the mixing chamber 12 were not at all times in open communication with .the atmosphere, it -is obvious that these constant conditions would stilll maintain, by the fact that the constant atmospheric pressure outside is resisted by a spring of practically even tension. Hence by my construction and arrangement of parts, l provide means for securing practically or approximately, 1st, a constant velocity of air'passing into the mixing chamber; 2nd, a constant proportion of opening as between the inspirator nozzle and the total air-inlet; and 3rd, the proportion of opening always being proportionate to the speed of the motor'. 1

By total air-inlet is meant not only the air-inlet opening through the hollow valve stem and radial passages 16 but also the opening around or past the cap of the valve provided for by the inlet ports 13 and the open communication between 'the air chamber and the atmosphere which that is provided for, in the present instance, by the ports 14.

lt is to be understood that mv ,invention is not limited to any specific form of admission valve, or to any details of construction and arrangement of parts, except as defined in the following claims. For instance, Figs. 3 and 4 illustrate another form of admission valve that may be employed, the valve 8a being constructed with a cap 7 formed with webs 17, the spaces between which constitute openings 16a in communication with the interior of the hollow stem 9, the openingsy 16a being similar in function to the openings 16 shown in Fig, 1 and indicated in Fig. 2.

' passage,

Having thus described the invention, what is claimed as new is:

1. A carbureter having a mixing chamber formed with an air inlet port, a fuel inlet passage open at both ends and communicating at one end with the outer air andv at its other end communicating with said mixing chamber, saidv air passage having imperforate Walls, an inspirator located inthe air a suction valve controlling the admission of air through the airport, and a spindle movable with the valve .and dependy ing therefrom into thel air.' passage, said A.spindle controlling the outlet from the inspirator.

2. A carburetor having a mixing chamber provided with air inlet ports lin its wall communicating withthe outside air, a valve controlling and normally closing said ports, an inspirator nozzle, an air passage imper- Vforate and continuous throughout its length surrounding the inspirator nozzle and having an unobstructed opening at both ends,

said passage beingv of constant area -at all times, one end of the passage communicating with vthe mixing chamber and theiother end surrounding and spaced from the inspirator nozzle, said air passage .being separated from and entirely independentV of the air inlet ports in the wall of the mixing chamber, and a spindle carried by the airinlet valveextending through said passage and into the inspirator nozzle andlcontrolling the passage' vof fuel from said inspirator in proportion 'to the opening of the air controlling valve.

3. A carbureter provided with a mixing chamber having a series of ports communicating with the outer air and a centrally arranged air passage, an inspirator mounted in said passage, connected to a source'offuel supply, a hollow valve in the mixing chamber. having openings communicating with the interior of the mixing chamber and controlling the inlet of 'air through said ports,

a tubular valve stem on said valve, extending down into the air passage, and an adjustable spindle carried centrally within said tubular stem of the valve and controlling the admission of fuel through said inspirator.

4.' A carbureter provided with a 4mixing chamber having a central air passage extending from it and a series of concentrically arranged air ports surrounding said passage, an inspirator located in said passage and connected to a source of fuel supply,l y

a hollow valve in the mixingchamber adapted to control'the inlet of air through said ports, av tubular valve stem extending from said valve into the air passage, av spring normally holding the valve to its seat against said ports, 'and a spindle carried bythe valve and extending down through the tubular stem thereof and controlling the inlet of fuel through said inspirator.

5. A carbureter having a mixing chamberin its upper part, formed with ports communicating with the outside air and having Ia central. downwardly4 extending air passage, a float chamber surrounding the air passage, a float fitting therein, 'an inspirator located centrally in said passage and communicating with the float chamber, a puppet valve in the mixing chamber, closing against said ports to prevent the admission ofair,

'tubular stem and engaging with the inspirator to control the supply of fuel thereto.l

6. In a carbureter, a mixing chamber having a series of air inlet ports communica-ting with the outside air, a central air inlet passage extending from the mixing chamber, said passage being imperforate and continuous along its entire length and communicating at one end with the mixing chamber and at its other end connected to a source of air supply, the opening at both ends of the passage having a constant area at all times, said air passage being spaced from the air inlet ports in the mixing chamber, a valve located in the mixing chamber and controlling said air inlet ports, said valve permitting a varying amount of air to enter the mixing chamber therethrough, an inspirator located within the air passage, and means carried by the valve and movable with it for variably controlling the amo-unt of fuel entering t-he air passage through the inspirator.

7. A carbureter having a mixing chamber; thewall of which is provided with a plurality of arir inlet ports, a tubular imperforate extensionforming an 4air passage and projecting from the mixing chamber and open a't both ends, the. end of the extension opposite to the mixing chamber communi- 'eating with a source of air, the other end of -the extension communicating with said mixing chamber, a valve located within the mixing chamber and controlling the inlet of air through the inlet ports, said valve having passages leading to its interior and opening upon the exterior of the valve, a tubular valve stem opening into said passages and having sliding engagement with the walls of the air passage, an inspirator nozzle connected to a source of fuel supply and extending up into the hollow stem, anda spin'- dle carried by the valve and extending down through the hollow stem thereof and controlling the passage of fuel through t-he inspirator nozzle. v

8. A carbureter having a mixing chamber provided with air inlet ports, an inspirator, a passage havingawall imperforate and conftinuous for its entire length surrounding the inspirator and communlcatingr at one end with the mix-ing chamber and-at the other end communicating with theoutside air beyond the mouth of the inspirator, said passage being separated from the air inlet ports ofthe mixing chamber and being adapted to carry a charge of fuel from the inspirator to the mixingv chamber, means for varying the quantity of air entering into the mixing chamber through said air inlet ports, means for permitting at all times a constant quantityof air t-o enter the air passage and pass int-o the mixing chamber. and means for controlling the inlet of fuel lfrom said inspirator l to the air passage in accordance with-the amount of air entering the mixing chamber V directly.

9. A caroureter having a mixing chamber, the floor of which is provided with a plu- A rality of air inlet openings, a tubular yextension projecting from the floor of the mixing chamber and open at bot-h ends, a valve located within the mixing chamber and controlling the inlet of air through said air inlet ports, said valve having passages leading to its interior, a tubular valve stem opening intosaid passages Vand having sliding -engagement with the walls of the air passage, a spring surrounding the walls of the air passage and engaging at its lower-end with the hollow stem of the valve, an inspirator nozzle connected to a source of fuel supply and extending up into the hollow stem,'and anadjustable spindle carried by the valve and extending down through the hollow stem thereof and controlling the passage of fuel through the inspirator nozzle.

l0. A carbureter having a mixing chamber, an oil-containing chamber and an air chamber disposed between the oil-containing chamber and the mixing chamber and provided with a series of ports communicating with the-outside air, a plurality of ports in the mixing chamber opening into the air chamber, an air duct open at both ends and extending through the center of the carbureter and opening at its upper 'ends into the air chamber, a tubular extension leading from the mixing chamber into said -air duct and spaced from the walls'thereof, a valve located in-the mixing chamber and controlling the air ports, therein, said valve having passages leading from its center, a tubular stem on said valve communicating at oneend with said passages and open at the other, an inspirator nozzle Supported in saidcentral air passage and communicating with the air-containing chamber, and a spindle adjustably mounted on the valve and extending through the tubular stem thereof and cont-rolling the passage-of oil through the inspirator nozzle.

.In testimonjT whereof I affix-my signature -in presence of two witnesses.

WALTER F. soHULz. 

